Use Stroke Work Calculator when you need to compute left ventricular stroke work from stroke volume and pressure gradient. Enter Stroke volume, Mean arterial pressure, and Mean atrial pressure using the definitions and units below so the result can be reproduced.

Stroke volume

A finite measured or assumed value greater than or equal to 5e-324, expressed in mL.

Mean arterial pressure

A finite measured or assumed value, expressed in mmHg.

Mean atrial pressure

A finite measured or assumed value, expressed in mmHg.

The published tool contract uses this rule: Compute left ventricular stroke work from stroke volume and pressure gradient.^[1]

Stroke work

The calculated stroke work in g·m.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.

Retain the original Stroke volume, Mean arterial pressure, and Mean atrial pressure values and their units alongside the result. Stroke Volume mL is useful when you instead need to compute stroke volume as end-diastolic volume minus end-systolic volume. Work Of Breathing provides another view by helping you convert a ventilatory pressure into mechanical work per liter of ventilation using the 0.0981 J/L per cmH2O factor.

• Stroke Volume mL

  Compute stroke volume as end-diastolic volume minus end-systolic volume.

• Work Of Breathing

  Convert a ventilatory pressure into mechanical work per liter of ventilation using the 0.0981 J/L per cmH2O factor.

• Elastic WOB

  Compute elastic work of breathing per breath as one half times elastance times tidal volume squared, converted to joules with 0.0981 J per cmH2O-L.